rotary

(noun) a road junction at which traffic streams circularly around a central island. Synonyms: traffic circle, circle, roundabout. Example: "The accident blocked all traffic at the rotary."

(noun) electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa. Synonyms: synchronous converter, rotary converter.

(adj) relating to or characterized by rotation. Example: "Rotary dial."

(adj) describing a circle; moving in a circle. Synonyms: circular, orbitual. Example: "The circular motion of the wheel."